NEW ORLEANS -- After taking snaps with the regulars during the week for the first time since being acquired by the Dallas Cowboys, running back Christine Michael is active for Sunday night's game against the New Orleans Saints.

Michael was inactive for the first three games, but he is not expected to see an expanded role behind Joseph Randle, Darren McFadden and Lance Dunbar. He does provide help in short-yardage and goal-line situations.

The Cowboys will also have defensive lineman David Irving active less than a week after claiming him off the Kansas City Chiefs' practice squad. Rookie Ryan Russell, a fifth-round pick, is inactive to make room for Irving.

Guard La'el Collins is inactive after starting last week against the Atlanta Falcons with Ronald Leary returning to action after a two-week absence with a groin strain.

Kellen Moore will serve as Brandon Weeden's backup with Matt Cassel inactive for the second straight game since he was picked up in a trade from the Buffalo Bills.

Also inactive for the Cowboys: wide receiver Lucky Whitehead, wide receiver Dez Bryant, Cassel, tight end Geoff Swaim and defensive end Randy Gregory.